[base] Speed up emboldening.

* src/base/ftoutln.c (FT_Outline_EmboldenXY): Use `FT_Vector_NormLen'.

ChangeLog

@@ -1,3 +1,9 @@
+2015-06-29  Alexei Podtelezhnikov <apodtele@gmail.com>
+
+	[base] Speed up emboldening.
+
+	* src/base/ftoutln.c (FT_Outline_EmboldenXY): Use `FT_Vector_NormLen'.
+
 2015-06-29  Alexei Podtelezhnikov <apodtele@gmail.com>
 
 	[base] Implement fast vector normalization.

src/base/ftoutln.c

@@ -946,12 +946,7 @@
       /* compute incoming normalized vector */
       in.x = v_cur.x - v_prev.x;
       in.y = v_cur.y - v_prev.y;
-      l_in = FT_Vector_Length( &in );
-      if ( l_in )
-      {
-        in.x = FT_DivFix( in.x, l_in );
-        in.y = FT_DivFix( in.y, l_in );
-      }
+      l_in = FT_Vector_NormLen( &in );
 
       for ( n = first; n <= last; n++ )
       {
@@ -963,12 +958,7 @@
         /* compute outgoing normalized vector */
         out.x = v_next.x - v_cur.x;
         out.y = v_next.y - v_cur.y;
-        l_out = FT_Vector_Length( &out );
-        if ( l_out )
-        {
-          out.x = FT_DivFix( out.x, l_out );
-          out.y = FT_DivFix( out.y, l_out );
-        }
+        l_out = FT_Vector_NormLen( &out );
 
         d = FT_MulFix( in.x, out.x ) + FT_MulFix( in.y, out.y );